發(fā)電廠及電力系統(tǒng)專業(yè)畢業(yè)論文

1、畢 業(yè) 設(shè) 計題目 蕭氏集團(tuán)中低壓配電網(wǎng)改造中繼電保 蕭氏集團(tuán)中低壓配電網(wǎng)改造中繼電保護(hù)故障分析與優(yōu)化設(shè)計 護(hù)故障分析與優(yōu)化設(shè)計 專業(yè)：發(fā)電廠及電力系統(tǒng) 班級： 20102092 When the article I, Section II the sensitivity coefficient is not enough, can use current, voltage interlocking speed

2、 protection. The first section protection action time is short, good speed, but the action current is large, full-length cannot protect circuit, protection range minimum; second section protection has a short action time

3、, and can protect the line length, but not as a back-up protection of adjacent elements; Chapter III action current protection over the previous two small, big protection range, full-length can protect the line can be us

4、ed as backup protection, adjacent line sensitivity is best, but the action time is longer, the speed difference. The main advantage of using the section I, Section II, III part stage current protection is simple, reliabl

5、e, and can meet the requirements of fast fault clearing in general.The graduation project is the subject of analysis and optimization design of relay protection and fault of low-voltage distribution network reconstructio

6、n of Xiao's group. The main task is to ensure the safe operation of power grid, the need for relay protection device configuration perfect. According to the power grid structure, the voltage level, line length, opera

7、ting mode and load properties requirements, to relay protection of low-voltage distribution network Xiao Shi group design appropriate.Keywords: low voltage network, relay protection, setting calculation, fault analysis,